Recent research has been focused on the transition metal-catalyzed reactions. Herein we have developed nickel-catalyzed synthesis of 3-aryl benzofurans from ortho-alkenyl phenols via intramolecular dehydrogenative coupling. Notably, simple O2 gas served as an oxidant, without using any sacrificial hydrogen acceptor. The strategy enabled the synthesis of 3-aryl benzofurans in good to excellent yields.
S. Aggarwal, D. Srinivas, C. Sreenivasulu and G. Satyanarayana, RSC Adv., 2020, 10, 22264 DOI: 10.1039/D0RA03071F
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